Why is a solution not a pure substance? a) it is made up of two substances that are chemically combined. b) it is made up of one substance. c) it is a mixture between a solute and solvent. d) the solute and solvent cannot be separated.

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false